柏叶口水库混凝土面板堆石坝施工期坝体排水

Drainage of Body in Construction period of Baiyekou Reservoir's Concrete Facing Rockfill Dam

柏叶口水库混凝土面板堆石坝施工期间,坝体内的水位可能会高于坝上游水位,从而会形成通过坝上游边坡垫层的反向渗流,破坏垫层及挤压边墙,甚至造成趾板,固结灌浆及惟幕灌浆等工程的施工困难,因此加强施工期坝体排水十分重要。文中论述了坝体排水的布置及主要施工方法,反向排水施工期的保护及其排水管的后期封墙。

In the construction period of Baiyekou Reservoir＇s concrete facing rockfill dam,it was possible that the water level in dam body would be higher than the water level in downstream foundation pit,it would lead to backword seepage through bedding on dam slop toward upstream,to destroy bedding layer,extrusion side wall and to bring difficult for construction of toe slab,consolidation grouting and curtain grouting.Therefore,dam body drainage during construction period is vital important.The paper introduces the layout of dam body drainage,the main drainage methods,the protection of backword drainage in construction period,and how to close the drainage pipe at the end.